It may just be my more or less casual observation, but --- Many seem to becoming "loose" on what is defined as a "birdie". Proper use of the term is to refer to a "fast tuning" signal that is produced by the receiver's mixing scheme and the harmonics thereof. That is a true "birdie".
Other annoying signals can be heard which originate from something other than the receiver itself. Those signals are real signals (whether desired or not) that are picked up by the antenna. For true receiver birdies, re-orienting the TMP cables and/or the use of the Signal Removal Tool in the K3 can be effective, but for signals that originate outside the K3, the only real cure is to suppress them at the source. Yes, I understand that identifying the true source can be a burdensome chore, but differentating between internal receiver "birdies" and external signal sources is a good starting point. Terminate the K3 antenna input with a well shielded dummy load (with a very short length of coax), and if the "birdie" is still present, it is a true receiver birdie, but if it is no longer present, it is a real signal and the source must be found to eliminate it with ferrites or other suppression devices. 73, Don W3FPR On 7/6/2011 6:04 PM, Mike Rodgers wrote: > I have a birdie at 50.09465 cw normal not rev on a cold k3 and the one at > 14.186. The latter being weaker and neither adding to the s meter. My shack > has no computers but a wal wart or two so I can confirm those two. > Auto notch has no effect. > > I believe as Tom mentioned there is a method to remove them or that specific > frequency they are on ( not sure which) but I havnt been bothered enough by > them yet. > > 73 > Mike R > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
